Abstract: A mounting assembly for an optical scanner includes a base unit with a hole for receiving a post of a rotor unit that includes a laser light source that emits light towards a bar code symbol or other object that reflects the light to a collector also mounted on the rotor unit. Flexures connect the base unit to the rotor so that the post and hole arrangement limits translational movement of the rotor unit due to a shock force applied to the optical scanner. The flexures may be use to transmit power signals to the rotor unit and to provide monitoring signals from the rotor unit.

Abstract: A diffractive collector for an optical scanner includes a wedged-shaped substrate having holographic grating provided on a front surface, a conical-shaped back surface, and at least one detector. Substantially parallel light is made incident upon the front surface of the substrate, and the light is diffracted within the substrate to the back surface. The wedged shaped of the collector and the holographic grating cause the light to reflect back within the substrate at such an angle that the light remains within the substrate as the light propagates to the at least one detector.

Abstract: A spectral densitometer system reads dosimeter cards. The cards contain bar codes with information for calibration of the system and for identification of the cards (serial numbers for each card). The densitometer has compartments optically and physically separated by a mechanism which contains a slide for receiving the cards and moving them into alignment with openings which expose the bar code to a bar code scanner in one of the compartments. The compartment containing the scanner also contains a source of illumination which projects through another opening and through a radiation sensitive patch. A scanning spectrophotometer in the other compartment reads the spectrum of the transmitted illumination. The system includes a computer, which may be a separate host computer, connected to the spectrophotometer and the bar code reader via communication ports. The computer computes the dosage based upon the wavelength measurements and the calibration information contained in the bar code.